King of B Main

iTrader: (40)

Steve and Barry,

It was awesome having you guys at the iic. I just wanted to Thankyou guys for all your help during the week.

Also wanted to Thank Novak for sending you guys because I saw alot of guys asking for help.

Thanks again

rinkrat99

Hi Steve

I am moving to the darkside, Lipo that is. Car will be a 12th scale with 1S Lipo (SMC 50C 4900mah)

RX is Spektrum SR3001
ESC GTB and GTB 4 cell
Digital Futaba Servo 9650

I believe the GTB will not support a 3.7V Lipo and probably will not operate, please confirm.

The 4 Cell GTB should operate with the Lipo but what is the LiPo cutoff voltage?

Thanks

Syber Serulean

iTrader: (28)

Steve,

A while back i heard of a Novak Endurance race. I got really excited about this, it sounded fun! (this was in december). I started talking to my work (Best Buy) about sponsoring me for the event and along with other people/companies and things seemed to be working out well on that side of things. Its a great marketing opportunity (especially for upcoming GTB replacement ESC hint hint).

Anyways, I was wondering if this was ever going to come to frution anytime soon? I heard OC Circuit was supposed to host it but it eventually faded to a whisp of a memory. An enduro on asphalt sounds awesome, would be nice to see this come back into the picture. Any words?

maxepower

iTrader: (1)

The GTB will work if you use the Novak Voltage booster! For that matter any ESC will work with a 1C Lipo as long as you use a Booster or a receiver pack!
Just my 2$

SweepRacingUSA

iTrader: (6)

Hey scuba, what is a default timing on NOVAK 13.5 Ballistic? I just got one last night and going to try this weekend

Steve Weiss

Thanks!


Mike,

No problem! It's always a pleasure being of service!

If you use our Smart Boost module you shouldn't have any trouble!

The ESC has some built in hardware that prevents the battery from being discharged below the minimum safe discharge voltage... not exactly intended for 1S LiPo cut off but it serves the same purpose!

Haven't made any strides towards anything honestly due to how busy we are and the OC Circuit thing fell through.

I will try to ask around and see if we'd be interested in spear heading something like this right now!


Thanks for the input!

All the Ballistics (except the 3.5) come set to 30 degrees of timing.

(The 3.5 is set to 25 degrees).

ERTRACHTER

Scuba it was good seein you in Vegas buddy

Syber Serulean

iTrader: (28)

thanks steve. I just see a nice opportunity to show off product (ballistic + next-gen GTB anyone?). Would be a nice point to add in.

InspGadgt

Hey Steve, nice to see you again at the IIC and have some opportunity to chat. I'm curious about if you've had a chance yet to test the LiPo booster with 4 cell NiMh. I'm about to convert my LiPo cars back to 4 cell but am debating using the booster with 4 cell as it would better power my Spektrum reciever and speed up the servo.

Steve Weiss

Hi Gadget,

I will try to do a little test in the next day or two ... but like I said before I am fairly certain it will not work quite right with 4 cell NiMH.

InspGadgt

Cool...thanks for looking into it.

rinkrat99

Hi Steve

Thanks for the feedback but I have to respectfully disagree.

You stated that using the Booster with either the GTB or 4 cell GTB would be no issues.

Two Questions: I would assume that the GTB (non 4cell) would not be able to operate with a 3.7V input, the receiver and servo would see the 6V output not the ESC control circuits.

2nd question, what is the safe discharge voltage on the 4 cell GTB? 3.0V or 2.7V which is deemed safe for a LiPo

It sounds to me that the GTB series regardless of input voltage will operate but the question and need for a booster is for the RX and Servo not the ESC itself which I believe derives its Source voltage from the Battery Pack not the RX. I believe and could be wrong that the ESC delivers the power to the RX which in turn powers the Servo therfore the Booster is required.

Thanks

chrisfrom619

Hi Mr. Steeve,

Is Novak will ever come out with the new heat sink that will serve a better heat dissipation for us onroad racers. I ran TC5R I think the heat sink fins should be parallel to the length of the car not against. I know the current heat sink would probably work better on a TC3 and 4 or other brand with a similar shaft design. It would be nice if there is something that will come out in the near future or if you can point me to the right direction.

Thanks,
Chris

Steve Weiss

Hi Rink,

Electrically the 4 cell GTB and the standard GTB are similar ... we do alot of work to ensure that our equipment works with a wide range of input voltage, especially under "low voltage" operation. While they will both "work" without a booster or receiver pack, running them off a regulated 6V input is best.

If you do not use a booster or receiver pack of any type when using a single cell LiPo, you will see that all the electronics will only see a maximum voltage of whatever the Lipo pack hapens to be at. If the pack is charged up to 4.2 V, the internal regulator in the GTB or 4 cell GTB will only be able to output 4.2 V as it does not have any internal boost circuitry. Therefore, the servo and receiver will only be operating on 4.2V.

Remember what I said earlier about how we take a lot of time to ensure that there's a decent input voltage range for our products? Most popular (IE, other brand's) receivers do not operate on anything under 5 V very well.

Servos tend to operate at this voltage but their performance will be hindered.

When you use a boost circuit or receiver pack, you ensure that the electronics are being fed their recommended 6.0V

2nd question: The 4 cell GTB does not have a dedicated single cell LiPo cut off voltage... indeed it doesn't even have a 2S LiPo cut off capability.

That being said, we do have some other circuitry built in that prevents power from being delivered to the motor when the input voltage drops below around 3.3V (radio prioritry circuitry) and acts as a cut off of sorts.

Chris,

We are working on something that will address your concerns!

rinkrat99

Thanks Chris, Now that makes sense